CVE-2025-3937: Tridium Niagara Information Disclosure Flaw

CVE-2025-3937 Overview

CVE-2025-3937 is a critical cryptographic vulnerability affecting the Tridium Niagara Framework and Niagara Enterprise Security platforms. The vulnerability stems from the use of password hashing with insufficient computational effort (CWE-916), which allows attackers to perform cryptanalysis attacks against stored password hashes. This weakness significantly reduces the time and resources required to crack passwords, potentially leading to unauthorized access to building automation and industrial control systems.

The Tridium Niagara Framework is widely deployed in building automation, energy management, and industrial control environments, making this vulnerability particularly concerning for critical infrastructure sectors.

Critical Impact

Attackers with access to password hashes can perform efficient cryptanalysis attacks due to weak hashing algorithms, potentially compromising authentication credentials and gaining unauthorized access to industrial control systems.

Affected Products

• Tridium Niagara Framework versions before 4.14.2, before 4.15.1, and before 4.10.11
• Tridium Niagara Enterprise Security versions before 4.14.2, before 4.15.1, and before 4.10.11
• Deployments on Windows, Linux, and QNX operating systems

Discovery Timeline

• 2025-05-22 - CVE-2025-3937 published to NVD
• 2025-06-04 - Last updated in NVD database

Technical Details for CVE-2025-3937

Vulnerability Analysis

This vulnerability falls under CWE-916: Use of Password Hash With Insufficient Computational Effort. The Niagara Framework employs a password hashing mechanism that lacks adequate computational complexity, making stored password hashes susceptible to cryptanalysis attacks. Modern password hashing best practices mandate the use of adaptive hashing functions (such as bcrypt, scrypt, or Argon2) that incorporate work factors, salting, and memory-hard computations to resist brute-force and dictionary attacks.

When a hashing algorithm lacks sufficient computational effort, attackers who obtain access to the password hash database can leverage GPU-accelerated cracking tools, rainbow tables, or specialized hardware to recover plaintext passwords in significantly reduced timeframes compared to properly secured implementations.

The vulnerability is exploitable over the network without requiring authentication or user interaction, which substantially increases the risk profile for exposed Niagara Framework deployments.

Root Cause

The root cause is the implementation of a password hashing algorithm that does not incorporate sufficient computational cost factors. This may include the use of deprecated hashing algorithms (such as MD5 or SHA-1), absence of per-password salts, or failure to implement iterative key derivation functions that increase the time required to compute each hash.

Building automation systems like Niagara Framework often store user credentials for administrative access, and weak password hashing directly undermines the confidentiality of these credentials.

Attack Vector

The attack vector is network-based, requiring the attacker to first obtain the password hash database through other means such as SQL injection, file system access, backup exposure, or exploitation of other vulnerabilities. Once the hashes are obtained, the attacker can perform offline cryptanalysis:

1. Hash Extraction: Attacker gains access to stored password hashes from the Niagara Framework database or configuration files
2. Offline Cracking: Using tools like Hashcat or John the Ripper, the attacker leverages the weak hashing algorithm to rapidly test candidate passwords
3. Credential Recovery: Due to insufficient computational effort in the hashing, passwords are recovered orders of magnitude faster than with secure hashing
4. System Access: Recovered credentials are used to authenticate to the Niagara Framework, potentially gaining administrative control

The vulnerability does not require any user interaction and can be exploited by unauthenticated attackers who have obtained the password hashes.

Detection Methods for CVE-2025-3937

Indicators of Compromise

• Unusual login attempts or successful authentications from unexpected IP addresses to Niagara Framework interfaces
• Evidence of database or configuration file access targeting user credential storage
• Presence of known password cracking tools or hash dump artifacts on compromised systems
• Lateral movement from Niagara Framework servers to connected building automation or ICS components

Detection Strategies

• Monitor authentication logs for anomalous login patterns, especially from previously unseen source addresses
• Implement file integrity monitoring on Niagara Framework configuration and database files containing password hashes
• Deploy network segmentation alerts for unauthorized access attempts to Niagara management interfaces
• Utilize threat intelligence feeds to identify known attacker infrastructure targeting ICS/SCADA systems

Monitoring Recommendations

• Enable comprehensive audit logging on all Niagara Framework deployments
• Configure SIEM correlation rules for failed authentication attempts followed by successful logins
• Establish baseline network communication patterns for Niagara systems and alert on deviations
• Implement honeypot credentials within the Niagara environment to detect hash theft and subsequent cracking attempts

How to Mitigate CVE-2025-3937

Immediate Actions Required

• Upgrade Niagara Framework to versions 4.14.2u2, 4.15.u1, or 4.10u.11 as recommended by Tridium
• Upgrade Niagara Enterprise Security to the corresponding patched versions
• Force password resets for all user accounts after upgrading to ensure passwords are re-hashed with the improved algorithm
• Restrict network access to Niagara management interfaces to authorized IP ranges only

Patch Information

Tridium recommends upgrading to the following patched versions:

• Niagara Framework 4.14.2u2
• Niagara Framework 4.15.u1
• Niagara Framework 4.10u.11
• Niagara Enterprise Security 4.14.2u2
• Niagara Enterprise Security 4.15.u1
• Niagara Enterprise Security 4.10u.11

For detailed patch information and download instructions, refer to the Niagara Community Tech Bulletin and the Honeywell Security Notices.

Workarounds

• Isolate Niagara Framework systems behind firewalls and VPNs to limit network exposure
• Implement strong password policies requiring complex, lengthy passwords that are more resistant to cracking
• Enable multi-factor authentication where supported to add defense-in-depth beyond password-based authentication
• Monitor for and restrict export or backup operations that could expose password hash databases

# Example: Network isolation configuration (firewall rules)
# Restrict Niagara management interface access to authorized management network only
# Replace with your specific firewall syntax and authorized IP ranges
iptables -A INPUT -p tcp --dport 443 -s 10.10.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP